Bennett's fracture, unsp hand, subs for fx w nonunion

This code signifies a Bennett's fracture, which is an intra-articular fracture of the base of the first metacarpal bone, involving the carpometacarpal joint of the thumb. The "unspecified hand" indicates that the laterality (left or right) of the injury is not documented. The "subsequent encounter for fracture with nonunion" specifies that the patient is receiving active treatment for a fracture that has failed to heal properly.

Use this code for follow-up visits where a patient with a previously diagnosed Bennett's fracture of an unspecified hand is being treated for nonunion. This includes scenarios such as surgical intervention for nonunion, casting or splinting adjustments, or medication management specifically addressing the nonunion. It is appropriate when the provider is actively managing the delayed or failed healing process.

• Always strive for laterality (left or right hand) if documented in the medical record; "unspecified" should be a last resort.
• Ensure the documentation clearly supports "nonunion" and not just delayed healing, as there are separate codes for delayed union.
• Verify that the encounter is for active treatment of the nonunion, not just routine follow-up after healing is complete.